JDEdwards platform of choice

As a JDE CNC consultant I'd say that in terms of bang per buck you'll get best results with NT - hardware is cheaper and faster, W2K is a lot more stable and the skills to support it are available. And the ability to cluster and provide other redundancy measures continues to improve. At 300 users I'd say NT / Oracle is your best bet, but as with everything there are details to be explored. Whilst UNIX is more stable still, you'll pay more for hardware and staff.... and AS400 is too costly I'd say at the 300 user level

Ed